EP0750817A1 - Appareil informatique et telephonique a interface conviviale et a caracteristiques d'integrite ameliorees - Google Patents
Appareil informatique et telephonique a interface conviviale et a caracteristiques d'integrite amelioreesInfo
- Publication number
- EP0750817A1 EP0750817A1 EP95914109A EP95914109A EP0750817A1 EP 0750817 A1 EP0750817 A1 EP 0750817A1 EP 95914109 A EP95914109 A EP 95914109A EP 95914109 A EP95914109 A EP 95914109A EP 0750817 A1 EP0750817 A1 EP 0750817A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microprocessor
- user
- communication device
- telephone
- personal communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
- H04M1/2471—Configurable and interactive telephone terminals with subscriber controlled features modifications, e.g. with ADSI capability [Analog Display Services Interface]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/02—Marketing; Price estimation or determination; Fundraising
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/02—Banking, e.g. interest calculation or account maintenance
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
- G07F19/20—Automatic teller machines [ATMs]
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
- G07F19/20—Automatic teller machines [ATMs]
- G07F19/201—Accessories of ATMs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/253—Telephone sets using digital voice transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/066—Telephone sets adapted for data transmision
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
- H04M1/2473—Telephone terminals interfacing a personal computer, e.g. using an API (Application Programming Interface)
Definitions
- This invention relates to a remotely reconfigurable user terminal in the form of a telephone-computer specifically designed for use in connection with a distributed data processing system. More particularly, this invention relates to a user terminal intended for use at the home of a bank customer to allow the customer access to the bank's database and operating software, as well as to access other remote data bases and the like.
- the present invention relates generally to methods for communication between a home microcomputer system and one or more computer networks providing information and financial services.
- the invention relates more particularly to methods for conducting communications between a home computer system and a generally conventional computer network in an extremely simple manner, such that no knowledge of computer operations is necessary for the user of a home computer system to obtain information or perform financial transactions through the computer network.
- ATMs automatic teller machine devices
- Such automatic teller machines typically operate using software prepared by individual programmers using personal computers.
- these personal computers are those manufactured by the IBM Corporation (the "IBM PC") or so- called “clones” thereof.
- IBM PC IBM Corporation
- clones Such personal computers run various software programs which conform to IBM's standards for such personal computers. hile such a requirement places various substantial constraints on the computer user, particularly concerning memory access and the like, at this time the IBM "PC” is so thoroughly entrenched throughout industry that it is most unlikely that any change can be made. More particularly, any home terminal or computer intended to be employed with a banking system now operating must emulate the IBM PC "architecture”; further details of this requirement are given below.
- PC's have been configured to comprise a keyboard of between 60 and 101 keys, a display device, and a housing containing the circuit boards of the computer including various interfaces to other devices such as modems for communication, printers and the like.
- Such PC's while increasingly popular, still intimidate many potential users.
- PC functionality that is, the ability to run conventional PC software programs without modification to the software, places very substantial constraints on the design of a computer which is to fit within a housing conforming in size and shape to that of conventional telephone.
- substantially all PC programs are designed to be stored on "floppy disks", or are initially supplied on floppy disks and later copied to a "hard disk” . Both of these memory devices require more space than is available in the housing of a conventional telephone.
- the circuit boards used conventionally in PCs are much too large to fit within a conventional telephone, as are the keyboards which are conventionally used. Accordingly, it is not possible to simply shoehorn the normal PC components into a housing resembling a conventional telephone.
- a computer which can simulate the operation of a system comprising floppy and or hard disk memory devices, as well as other input-output (I/O) devices such as printers and the like, while fitting within the confines of a housing of familiar and nonthreatening appearance, preferably conforming in size and appearance to that of a conventional telephone.
- I/O input-output
- a home terminal is to provide access to a banking computer to perform financial transactions, a very high degree of security must be built into the system, such that the user cannot corrupt his own or other accounts, cannot withdraw assets from other accounts, and most importantly cannot cause a system error of a type which would cause the entire bank computer system to cease operations, however briefly. To do so means that the home terminal must interact with the network in a sophisticated way. It is also highly desirable that the interaction of terminal and host be amenable to convenient alteration at a later time if it should become necessary.
- This Megatel computer (1986) Corporation, of Weston, Ontario, Canada, with which at least one of the inventors named herein is affiliated, has been selling for more than a year prior to the filing date of this application a single board computer which is capable of emulating an IBM Personal Computer and thereby of running conventional software programs intended for use with conventional IBM PCs.
- This Megatel computer has on its single circuit board a microprocessor, typically a Nippon Electric Corporation (NEC) model V25 or V40, a programmable gate array chip sold by Xilinx Corporation under Model No. XC2018 or the equivalent, both random access memory (RAM) and read-only memory (ROM) and various input-output devices as well as associated connectors and the like.
- NEC Nippon Electric Corporation
- ROM read-only memory
- one program may require a so-called "hard disk” having 40 megabytes storage capacity. Another may require one megabyte of RAM. A third may require an optical disk; a fourth a VGA adapter card, and a fifth, two floppy disks.
- PC- compatibility only implies with respect to a particular software program that a PC be configured with appropriate optional internal devices and peripherals on which the software will then run; it does not mean that all "PC- compatible" software will run on the same PC.
- the basic hardware components of the PC itself include a microprocessor, a certain amount of read-only and random-access memory (“RAM” and “ROM” respectively) , and circuit elements providing logical connection between these various basic components as well as to the keyboard and the display, and to any peripherals such as modems, printers, external memory and the like.
- the peripherals are normally connected directly to various dedicated “driver” and “interface” chips, which are in turn connected by logic circuit elements to the microprocessor, RAM and ROM.
- all PC's require some sort of hardware, i.e., discrete circuit elements, to provide appropriate logical connections to functionally "glue” the microprocessor, RAM, ROM, and the various dedicated input/output devices and peripheral drivers together.
- BIOS Basic Input/Output System
- BIOS provides the interface between the usual PC-compatible software programs (which are also referred to the art as “DOS-compatible” , which means that they are designed to work with IBM's Disk Operating System, or DOS; DOS is thus only useful if the BIOS and BIOS-compatible hardware are already in place) and the actual hardware elements.
- DOS Disk Operating System
- PLA programmable logic array
- the BIOS used by Megatel in this computer is also commercially available.
- the "glue” required to functionally connect the microprocessor, the memory, and the input-output chips is provided by configuring the PGA chip by supply of a series of signals, referred to by Xilinx as “configuration programs” and sometimes herein as “configuration code” or “configuration software” .
- this configuration code defines the logical connection of various basic logic elements on the PGA chip.
- a significant advantage is provided by use of his chip, in that by supply of new configuration code, changes can be made to the hardware connecting the microprocessor to the memory and the inpu -output chips on the circuit board.
- this can be done readily by simply supplying reconfiguration code appropriately to the PGA chip and reconfiguring it before the software is to be run.
- use of the PGA chip in many cases will allow reconfiguration of the hardware to support new peripherals -- e.g., an enhanced-resolution display, an optical disk storage device, so-called “smart" or debit-card readers, or the like, which in other systems would normally require the physical addition of a new circuit board or the like.
- a piece of software running on a IBM PC operates properly when it "receives” an appropriate sequence of signals from the microprocessor in response to the signals it "generates".
- a microprocessor may be directed by software to send a certain data item to a floppy disk for storage.
- the floppy disk controller responds to such a request with a predetermined acknowledgement signal; when this signal is received by the software, it then performs a subsequent function.
- the PGA chip is configured to respond to a particular signal provided by the software with the proper acknowledgement signal, the software can be "fooled” into thinking the PC is configured with certain peripherals when in fact none is provided.
- the PGA chip need simply be configured to respond to a known sequence of signals with a corresponding sequence of response signals, thus fooling the software into thinking it is running on a properly configured PC.
- microprocessors for telecommunications applications are known in the art, as shown by Subhash Bal, "New Generation Microprocessor for Telecommunication Applications. " Proceedings 1980-International Conference on Communications, Seattle, Washington, (June 8-12, 1980) pages 11.5.1 - 11.5.4. Additionally, microprocessors have been used as control apparatus for a number of communication system administration functions and in switching systems as shown in United States Patent No. 4,580,011 to Robert E. Glazer, issued April 1, 1986 and United States Patent No. 4,629,832 to Robert A. Carson et al, issued December 6, 1986. It is known that, to increase system integrity, the administration functions in a telephone network can be controlled by a microprocessor to facilitate the interaction of a private branch exchange or similar telephone network with a telephone central office.
- the microcomputer with simplified user interface of the present invention is incorporated in a small desk-top housing which has the general appearance of a standard desk telephone.
- the present telephone-computer in accordance with the present invention includes four basic components which cooperate together to provide improved telephone and computing functionality.
- a primary microprocessor including a central processing unit (CPU) , memory elements associated with the CPU and certain hardware integrity features protecting the CPU; (2) a Programmable Gate Array (PGA) comprising a logic cell array which provides the means for dynamically reconfiguring the basic architecture and control logic of the primary microprocessor; (3) telephone electronics comprising (i) a manual telephone circuit including a dialer, speech network and ring detector powered by the telephone line voltage, (ii) a keyboard/keypad microprocessor receiving input from a telephone keypad and a keyboard input device and associated hardware to provide an interface between the telephone operation of the device and the primary microprocessor; and (4) a modem for data transfer to and from the primary microprocessor over the telephone line.
- CPU central processing unit
- PGA Programmable Gate Array
- the telephone elements of the device are operated from a conventional 12-key telephone keypad through the telephone electronics of the device and perform normal telephone functions.
- the telephone electronics may also provide inputs through a keyboard microprocessor to the central processing unit of the primary microprocessor and its extensive memory.
- An additional 52-key keyboard in the QWERTY format, normally hidden in the telephone housing, provides additional inputs to the central processing unit of the primary microprocessor through the telephone electronics.
- Inputs to the primary microprocessor may, in the alternative embodiment, be provided by a programmable function key.
- the primary microprocessor in conjunction with a multipurpose graphics display controller provides an output to a small display device such as a liquid crystal display (LCD) or a small cathode-ray tube display device mounted in the housing of the device for viewing by the operator.
- a small display device such as a liquid crystal display (LCD) or a small cathode-ray tube display device mounted in the housing of the device for viewing by the operator.
- the programmable gate array can also be readily reprogrammed to drive other sorts of displays such as conventional EGA or CGA monitors, plasma displays or the like.
- the reconfigurability of the programmable gate array allows very substantial flexibility in use of the device according to the invention.
- the primary microprocessor itself is connected to the telephone line through a modem and, thus, is capable of dialing and communicating with other parts of a computer network.
- the primary microprocessor may be programmed to incorporate dedicated software functions including a record manager for reading and writing data, such as records, into the primary microprocessor memory, a telephone list, activity log, a user configuration record and a diagnostic log. The logs may be sent to another computer via telephone line for further processing.
- the primary microprocessor includes certain software diagnostics which control the microprocessor's status and provides for overall microprocessor protection.
- the primary microprocessor is also connected to a modem which permits the transfer of data from the primary microprocessor over the telephone line.
- the primary microprocessor is a general purpose computer and may be programmed in any standard manner.
- the primary microprocessor can be programmed to include certain fixed functions as will be explained in detail below.
- One application program usable on the primary microprocessor is implemented using a software language designated Home Access Language (HAL) .
- the application program is formatted in logic pages. A page includes screens to be displayed on the LCD display and logic associated with specific operations described on the screens.
- the application program written in HAL is compiled into pseudo-code on a mainframe computer and is translated into an executable format by a HAL interpreter incorporated in the 256K byte ROM.
- the application program when incorporated in the primary microprocessor, permits it to receive input from the keyboard microprocessor and the modem and to perform certain programmed functions as explained below.
- the program "pages" supply the telephone-computer with sufficient “prompts” to elicit from the user whatever information -- user codes, desired transactions, and the like -- is required to access one of a plurality of service computers to which the network host computer is connected by conventional telephone lines.
- the telephone-computer communicates with the network host computer via a message having a first protocol.
- the network host computer transforms this information into whatever second protocol is conventionally required to communicate with the service computer.
- One object of the invention to provide a device with the features of a computer, housed in a unit which appears to the user to be no more complex than an ordinary telephone.
- Another object of this invention to provide a user friendly microprocessor controlled for most operations through the 12-element keypad of a normal telephone.
- Another object of this invention to provide a highly capable computer usable as a telephone and also responsive to the user's commands made through the keypad.
- Another object of the invention is to allow a network host computer to download program pages which are compatible with the present telephone-computer or a PC to access a variety of different information and financial services which communicate with the network host computer via conventional telephone lines in languages which are compatible with the normal information and financial services, but which are not compatible with the present telephone-computer or the PC.
- Yet another object of the invention is to provide a telephone configured as a reconfigurable general purpose computer which may be reconfigured on site or remotely.
- Figure l is a front perspective view of a first embodiment of the telephone-computer in accordance with the present invention.
- Figure 2 is a rear perspective view of the telephone- computer of Figure 1.
- Figure 3 is a front perspective view of a second embodiment of the telephone-computer in accordance with the present invention.
- Figure 4 is a rear perspective view of the telephone- computer of Figure 3.
- Figure 5 is a side view of an access drawer having a QWERTY 52-key keyboard.
- Figure 6 is a plan view of the access drawer having a
- Figures 7 and 8 are perspective and plan views of the invention as used in a public booth deployed with peripheral equipment.
- Figure 9 depicts in block diagram format the functional components of the telephone-computer of the invention.
- Figure 10 depicts in block diagram format principal semiconductor components utilized in the telephone-computer of the invention.
- Figure 11 depicts in block diagram format a system support overview of the software functions of the primary microprocessor of the telephone-computer of the invention.
- Figure 12 depicts in block diagram format the primary microprocessor's software interface with the conventional telephone circuitry of the telephone-computer of the invention.
- Figure 13 is a functional block diagram of the telephone electronics and related communications features of the telephone-computer of the invention.
- Figure 14 is a functional block diagram of the primary microprocessor, with input/output functions of the telephone- computer of the invention.
- Figure 15 is a memory map of the memory elements of the primary microprocessor of the telephone-computer of the invention.
- Figure 16 is an overall view of a distributed data processing system which is accessed by the telephone-computer of the invention.
- Figure 17 shows an overall view of a distributed data processing system which is accessed by the telephone-computer of the invention.
- Figure 18 is a diagrammatic view of the message format employed according to the processing system of Figure 17.
- Figure 19 is a diagrammatic view of a connect message employed according to the processing system of Figure 17.
- Figure 20 is a diagrammatic view of a connect response message employed according to the processing system of Figure 17.
- Figure 21 is a diagrammatic view of a transaction message format employed according to the processing system of Figure 17.
- Figure 22 is a diagrammatic view of a page downloading message text format employed according to the processing system of Figure 17.
- Figure 23 is a diagrammatic view of a page update request message employed according to the processing system of Figure 17.
- Figure 24 is a diagrammatic view of a response to the page update request message of Figure 23.
- the telephone-computer device of the present invention has the overall appearance of a conventional desk-top telephone unit.
- the present telephone-computer invention is incorporated in a telephone housing so that it presents to a technically unskilled operator a format with which he or she is familiar, i.e. a conventional telephone.
- the telephone-computer device of the present invention may be incorporated in a wall telephone or any other conventional telephone format.
- the invention is designed to operate both as a standard telephone unit and as a microcomputer in a computer network.
- the housing for the invention further includes controls 12 and 13 for the display 4, an accessories port 10 (to support printing or initial speed loading of the RAM) , a connection 9 to a telephone line, controls 7 and 8 for the telephone speaker and ringer, and a control 6 for the telephone dialer (selection of pulse or tone) , and is located on the bottom of the telephone-computer device.
- the telephone-computer of the present invention includes a primary microprocessor and associated memory, and is designed to have a simplified user interface.
- the interface is operated through the telephone unit using the 12-key keypad 3 of the telephone.
- One key of the 12-key keypad is designated a HELLO key and activates the primary microprocessor control of the telephone as explained below.
- the telephone keypad 3 activates either tone or pulse dialing functions for the electronics of the telephone incorporated in the device and also provides input through a keyboard/keypad microprocessor to the primary microprocessor element of the invention.
- the primary microprocessor may also receive input through the keyboard/keypad microprocessor from a 52-key keyboard 14 shown in Figures 5 and 6. This board has a QWERTY format and is normally hidden from view.
- the user interface also includes a display 4 which receives its input directly from the microprocessor via a multipurpose graphics display controller.
- the display 4 is a flat panel liquid crystal display (LCD) .
- the programmable gate array can also be readily reprogrammed to drive other sorts of displays such as conventional EGA or CGA monitors, plasma displays or the like. In some cases it may be desired to employ a further additional display driver chip, which itself provides certain display driver modification possibilities.
- the reconfigurability of the programmable gate array allows very substantial flexibility in use of the device according to the invention.
- Figures 3 and 4 disclose an alternative embodiment of the invention in which the 12-key keypad is augmented by four function keys 3a, 3b, 3c, and 3d.
- one of the function keys is a service key which performs the functions of the HELLO key in the preferred embodiment.
- the other function keys are programmable and may perform the standard functions of speed dial, flash or redial.
- the device may be operated at a public booth 20 as shown in Figures 7 and 8.
- the apparatus of the invention is placed in a form fitted hole in a counter top with only the upper housing visible.
- the device is deployed with several peripheral items in close proximity in a user- friendly arrangement.
- the peripheral items which are connected to the apparatus of the invention include a card reader 21 for reading magnetic information imprinted on cards and a printer 22 capable of printing transaction journals.
- Other items connected to the apparatus in this configuration, but which are not user-visible, are (l) an attachment called an expansion box for converting signals coming out of the connector on the back of the apparatus, allowing for card reader and printer connection, (2) two floppy disc drives for expanded software and (3) an external power supply to drive the card reader and disc drives.
- Figure 9 depicts the basic structure of the hardware of the telephone-computer unit.
- the device of the invention includes four basic elements (l) the telephone electronics, generally indicated at 29, (2) a programmable gate array (PGA) , generally indicated at 30, (3) a primary microprocessor with memory, also generally indicated at 30, and (4) a modem 27.
- the telephone electronics provides input to the primary microprocessor of the invention and also acts as a telephone.
- the primary microprocessor itself includes an 8086 compatible central processing unit and is compatible with the standard International Business Machine (IBM) PC/XT at the BIOS level.
- IBM International Business Machine
- a map of the primary microprocessor memory of the telephone-computer is shown in Figure 15.
- the microprocessor includes six-memory units, a volatile writable 512K byte RAM memory, a non-volatile writable 192K byte RAM memory with battery backup protected for a specified period, a 256K byte non-volatile non-writable ROM memory, an 8K byte character generator ROM memory and a 16K byte display memory for interface with the display.
- the volatile RAM memory is intended for holding microprocessor program information and other data.
- the display is controlled by a multipurpose graphics display controller which can provide black and white or color CRT or drive an LCD display panel.
- the primary microprocessor memory may include a 32K byte electrically erasable programmable read-only memory (EEPROM) or a static RAM memory with ten-year built-in battery protection for recording user information such as telephone numbers and addresses.
- EEPROM electrically erasable programmable read-only memory
- static RAM memory with ten-year built-in battery protection for recording user information such as telephone
- Figure 10 shows in block diagram form the principal elements of the remotely reconfigurable computer system comprised by the telephone-computer 2 ( Figure 16) .
- a microprocessor 30 which may comprise a Nippon Electric Corporation (NEC) Model V25 or V40 or the equivalent is connected to a programmable gate array 32 which as indicated above will typically be the model XC2018 of Xilinx Corporation of San Jose, California.
- the PGA provides the means for dynamically reconfiguring the basic architecture and control logic of the computer.
- the "glue” required to functionally connect the microprocessor, the memory, and the input-output chips is provided by configuring the PGA chip by supply of a series of signals, referred to by Xilinx as “configuration programs” and sometimes herein as “configuration code” or “configuration software” .
- a significant advantage is provided by use of this chip, in that by supply of new configuration code, changes can be made to the hardware connecting the microprocessor to the memory and the input-output chips on the circuit board.
- this can be done readily by simply supplying reconfiguration code appropriately to the PGA chip and reconfiguring it before the software is to be run.
- use of the PGA chip in many cases will allow reconfiguration of the hardware to support new peripherals -- e.g., an enhanced- esolution display, an optical disk storage device, so-called “smart" or debit-card readers, or the like, which in other systems would normally require the physical addition of a new circuit board or the like.
- the reconfigura ion code is stored in a FLASH- EPROM, a read-only memory which is erasable and rewritable in response to a signal received from a remote location.
- a FLASH- EPROM a read-only memory which is erasable and rewritable in response to a signal received from a remote location.
- 256 kilobytes of FLASH-EPROM will normally be sufficient.
- a computer virus is attacking the microprocessors 30 of the telephone-computers. . Any such virus will have to conform to the microcode used to run the microprocessor.
- some of the functions of the gates internal to the programmable gate array 32 can simply be reversed, and a corresponding change made to all software downloaded to the telephone-computer to enable it to access the various service computers. The virus, not having the benefit of the change, will cease to operate and thus cease to interfere with the operation of the telephone- computer.
- data encryption can be provided by reconfiguring some portion of the code stored in the FLASH- EPROM 34 and thus reconfiguring the gates of the programmable gate array.
- PGA chip inherent in the PGA chip is the ability to initially configure it to provide the requisite interconnections between the primary microprocessor, its associated memory and the input-output chips, and then to re ⁇ configure the PGA chip in order to provide different interconnections.
- interconnections can be initially programmably configured and then fixed using such devices as PLA chips, as disclosed above, or other conventional means instead of the reconfigurable PGA chip.
- the microprocessor 30 and the programmable gate array 32 are connected as well to a main memory 36 which comprises random access memory (RAM) 36 as is conventional in the art. Up to 2 megabytes of memory are typically provided.
- RAM random access memory
- the random access memory 36 will normally be used to store application programs downloaded from a remote host, but also stores reconfiguration code when first received, prior to its being copied into the FLASH-EPROM 34.
- FIG. 16 is provided via a serial data port indicated generally at 40.
- port 40 is also connected to a system integrity chip 38 typically comprising a single chip Model 16C54 computer sold by the Microchip Corporation.
- This chip has the capability of both storing and executing code.
- Certain "kernel" code required to initially program the programmable gate array chip 32 is permanently stored in non-volatile, non-rewriteable ROM comprised by the system integrity chip 38 at manufacture.
- the system integrity chip is capable of copying this kernel code to the programmable gate array chip 32.
- the PGA chip 32 will first exercise the microprocessor 30 and verify circuit connections. Thereafter, the configuration code can be downloaded via the same port 40 or another port, stored in the random access memory 36, copied to the FLASH-EPROM 34, and used to reconfigure the programmable gate array 32.
- the ROM 38a of the system integrity processor 38 will have stored therein the basic "kernel” or "system initialization software", required to allow configuration of the programmable gate array device.
- the system integrity chip which may also be termed a "test processor”, initially configures a portion of the programmable gate array device to perform a "serial scan test" which will verify the physical circuit connections of the chip. This is particularly useful because the programmable gate array chip 32 will typically be physically connected to substantially all signal paths on the circuit board, so that this test is in fact substantially complete.
- the system integrity processor 38 having completed this test, then causes a first group of "system verification software" to be downloaded either from an external processor, such as the host network computer, or from a technician's test device, to reconfigure a portion of the programmable gate array to resemble read-only memory containing certain predetermined microcode.
- This microcode is then used by the microprocessor 30 to test its own functions, which typically will include testing of the random access and read-only memory devices.
- the microprocessor 30 can take over operations, and causes further reconfiguration code, the "operational reconfiguration code" (according to which the programmable gate array chip 32 is configured to perform its ultimately desired functions) to be downloaded.
- the "operational reconfiguration code” is stored in duplicate in the FLASH- EPROM. This allows the two versions to be compared to one another, providing an additional check on system integrity.
- the diagram as depicted in Figure 10 is intended to be a functional depiction, and that in fact various principal components thereof such as the microprocessor 30, the PGA 32, the FLASH- EPROM 34, the RAM 36, the system integrity processor 38 and its ROM 38a, may all be connected by a conventional data bus 48.
- the key function of the present telephone-computer is that it can be capable of receiving and storing reconfiguration code preferably received over a telephone line or the like via a conventional port, so as to enable reconfiguration of the PGA as needed to update the hardware configuration of the system.
- the highest "level” of software in the telephone- emulating version of the system is referred to as the "home application language” or "HAL" software.
- the HAL software is downloaded in "pages" from a network host computer in response to the user's indication that a particular service is to be accessed. If the user indicates that he wants to determine his checking account balance, typically by pressing a single button on the telephone-computer 2 in response to a prompt, the telephone-computer 2 sends an appropriate message to the network host 68 ( Figure 16) , after which the network host 68 downloads the appropriate page of HAL software necessary to prompt the user to input his user code and the like.
- the HAL software when received by the telephone-computer is stored in random access memory (RAM) 36 and normally is run immediately.
- HAL application software may also be stored by the telephone-computer, typically in FLASH- EPROM 34, in order to reduce the number of communications required to access the network host where this would appear useful. It is envisioned that on the order of 3-10 pages of HAL software might be typically downloaded to a telephone- computer per day.
- the HAL software thus provides the information necessary to provide the desired user-friendly user interface, and is downloaded in response to the user's specific request, as described in greater detail below.
- the HAL software is thus functionally comparable to IBM's Disk Operating System (DOS) software.
- DOS Disk Operating System
- BIOS basic input-output system
- BIOS software supports various functions shared by various pages of HAL software such as display control, preparation of messages to the network host, support of keyboard functions, and the like.
- updated "multi-application" BIOS software can be downloaded from the network host when needed, a process which might take place on the order of several times per year. Updated BIOS software will initially be received in RAM and will then be copied to FLASH-EPROM for long term storage. It will be appreciated by those of skill in the art that the BIOS software provides functions which are employed by the HAL software and is thus essential in order that the HAL software can run properly.
- the next lower level of software is the reconfiguration software or code which defines the state of the programmable gate array (PGA) .
- This is also referred to as "PGA code” or “configuration code” .
- Functions provided by the PGA chip programmed in accordance with the PGA code include functions which must be performed at high speed, such as memory control and timing, and parity checking with respect to various data communication paths, as well as providing the logic connecting the microprocessor to the RAM, ROM and input/output devices.
- any update to this reconfiguration code downloaded from the network host is initially stored in the random access memory and then is copied to the FLASH-EPROM and used to reconfigure the PGA chip as need be.
- the hardware can readily be reconfigured such that the virus could no longer run on the telephone-computer. This would of course necessitate that other software including the BIOS and possibly the HAL software be at least partially rewritten. However, these tasks can also be accomplished remotely.
- the PGA code could also be altered remotely if it were desired to add additional functions to the telephone- computer of the invention, such as adding a facsimile capability, a smart card interface, magnetic or optical memory elements, or the like. In some cases it might also be necessary to reconfigure the PGA code to cure a flaw in the hardware design detected some time later. Again, each of these options substantially increases the utility of the telephone-computer. It is not envisioned, however, that the PGA code will be altered more than once or twice over the lifetime of the product, which is anticipated to be on the order of ten years.
- the PGA code having reconfigured the PGA chip, thus provides the foundation on which the BIOS software operates; accordingly, the PGA chip must be configured properly for the various input-output functions controlled by BIOS to operate properly.
- the final and lowest level of software is referred to as a "kernel".
- This software is permanently written to nonvolatile read only memory comprised by the system integrity chip 38 or possibly by a separate ROM. It is this kernel which operates the system to the extent required to allow the reconfiguration software to be downloaded to the telephone- computer in order to initially program the PGA chip as indicated above. It is not possible to alter the kernel after manufacture of the system. Again, this Software is essential in order that the PGA chip can be reconfigured by supply of reconfiguration code.
- the above described software structure provides partitioning of the various elements of software according to their functions and their frequency and ease of access.
- the higher level sof ware will be more frequently accessed.
- the higher levels are variable in response to a user request (in the case of the HAL application) or relatively readily by the operator of the network host (in the case of the BIOS software) .
- Access to the PGA reconfiguration software will be restricted to the manufacturers or to a relatively small group of the system operators in order to ensure that this highly significant software is not tampered with.
- the kernel software is not alterable.
- an extremely important object of the present invention is to allow the user to access a bank data base.
- the system must be made highly reliable.
- the capability of reconfiguring the actual logic of the telephone-computer according to the invention substantially enhances this security.
- a hardware change can be made at any time to support a change in the software desired, for example, to alter access requirements to prevent fraudulent users or to forbid them to access the data base.
- data encryption could be made essential to all terminal-to-network host communications.
- Regular changes e.g.
- Figure 8 sets forth an overview of certain software functions when the primary microprocessor is programmed in the HAL format.
- the primary microprocessor receives certain standard software applications after compilation into the HAL pseudo-code. These applications are interpreted by a HAL interpreter located in the 256K ROM.
- the initial HAL application pages, certain specific routines, customer data and/or configuration data are written into the battery-backed memory so that they are protected against power failure. In the alternative, all such data except customer data may be placed in the ROM.
- the primary microprocessor programs define certain microprocessor configuration parameters including the boundaries of the memory for the application pages as well as the data memory areas.
- the system software also provides that data pages may be written in the volatile memory.
- the primary microprocessor transfers the new page from a network data bank and overwrites the pages which are least recently used. These overwritten pages may be retrieved from the network memory through the modem, if required again.
- the system software also provide input to microprocessor diagnostics and create a power-on self test for the microprocessor.
- the program invokes a record manager which manages a telephone list data record, activity logs, a personal configuration module and diagnostic log. Certain elements of these records are maintained in the writable battery-backed memory to provide protection against power failure.
- the invention's support circuitry provides a number of integrity features. These include the following error detection or failure prevention features: (1) a determination as to whether the microprocessor software is functioning properly when the telephone is taken off-hook, (2) a watchdog timer to ensure that the computer software is not malfunctioning, (3) a parity check for the microprocessor's 512K byte volatile random access memory
- RAM random access memory
- the telephone electronics includes an off-hook timer which, when armed, senses the removal of the handset from the telephone.
- the function of the off-hook timer is to ensure that the primary microprocessor software is functioning properly each time the telephone is taken off-hook.
- the off- hook timer is set to expire at the end of a period designated off-hook timer expiration (OHTE) . If the timer expires without being halted, the telephone features of the device are placed in the manual mode (i.e. the telephone continues to operate as a normal telephone) and the microprocessor is reset.
- the microprocessor includes a watchdog timer which is reset through the microprocessor's Input/Output bus. If, in the period designated watchdog timer expiration (WDTE) , the watchdog timer is not reset by the primary microprocessor, a nonmaskable interrupt (NMI) is generated as an input to the microprocessor. If the timer is allowed to expire a second consecutive time, a hardware reset is generated which disables the timer, decouples the telephone electronics from the primary microprocessor, reboot the primary microprocessor and activates a service light on the housing.
- WDTE watchdog timer expiration
- NMI nonmaskable interrupt
- the microprocessor circuitry provides a parity check for the 512K byte non-battery-backed-up RAM memory.
- the parity error detector provides the same type of NMI and failure protection as the watchdog timer.
- An automatic sequencing is provided to eliminate the need for a manual reboot. If no parity error is associated with the RAM, and there is a reboot caused by a hang-up in a non-memory component, the system will execute a soft reboot without the loss of memory.
- the telephone-computer electronics provides power failure protection features.
- the microprocessor's power failure detection circuit is responsive to certain interruptions in power to the microprocessor or low power conditions and notifies the microprocessor software after receipt of the warning detections when certain thresholds are crossed. In response to these warnings, the primary microprocessor places itself in a condition for minimum disruption if power failure occurs.
- FIG. 13 is a block diagram of the telephone electronics of the invention.
- the 12-key telephone keypad includes a novel split pill output element which provides two separate output signals. One output is directed to the keyboard/keypad processor and the other to the telephone dialer. The dual output is always provided.
- the telephone dialer provides a pulse or tone dialing output to the telephone line.
- the telephone dialer function is deactivated through the direct keypad dialing switch if the processor determines that the output at the keypad should only be directed to the microprocessor and is not a part of the device's normal telephone dialing features.
- the direct keypad dialing switch allows the primary microprocessor to remove power from the dialer so that the keypad only provides input to the primary microprocessor.
- a phone hook switch may be controlled from the primary microprocessor to connect the dialer to the telephone line without raising the handset.
- a main telephone switch also controlled from the primary microprocessor connects the output of the telephone dialer to the outside telephone line.
- the direct keypad, dialer telephone hook, and main telephone switch are all controllable from the microprocessor to permit the telephone dialer to provide pulse or tone outputs or deactivate these outputs.
- One key on the 12-key keypad usually the key, acts as a services key and may be designated a HELLO key. Activation of this services or HELLO key, when the telephone is on-hook, changes the primary microprocessor's control over the telephone from a monitoring mode to a controlling mode.
- the services or HELLO key feature provides computer enhanced telephone operation when the telephone is not connected to the network.
- the application on the primary microprocessor in response to the services or HELLO key, typically provides a menu of microprocessor services, eliminates power to the telephone dialer (preventing unwanted dial tones from being transmitted to the network) and provides for transition of the telephone network to computer control.
- a function key may be used in place of the HELLO key to obtain microprocessor control over the telephone.
- one or more function keys may be mounted on the housing case of the invention adjacent to the 12-key keypad. Any function key or selected keys of the 12-key keypad can be programmed through the primary microprocessor for specific functions selected by the manufacturer. In one embodiment, function keys for speed dial and re-dial may be provided.
- the device may include a flash key which performs its standard function in a telephone device. The selected keys of the 12-key keypad may be programmed for these functions.
- the telephone electronics includes a keyboard/keypad processor which provides an interface between the 52-key keyboard and 12-key keypad and the primary microprocessor.
- the alternative embodiment disclosed in Figures 3 and 4 uses one or more function keys.
- function key input is also provided through the keyboard/keypad processor.
- the interface circuitry and the primary microprocessor will support up to eight function keys.
- the keyboard/keypad processor also includes the invention's tone detection circuitry.
- the tone detection elements sense (l) busy/fast busy, (2) call-waiting, (3) ringing or (4) dial tone and provide these detections as an input to the primary microprocessor through the keyboard/keypad processor.
- the ring and dial tones are also provided through the speech network to the telephone handset.
- the primary microprocessor provides a serial input to the modem which can be connected by control from the microprocessor to the main telephone line.
- the primary microprocessor and the keyboard/keypad processor have an established joint protocol requiring the primary microprocessor to have input from the keyboard/keypad processor every five seconds. If such input is not received, both processors will be reinitialized.
- the primary microprocessor is connected to a 1200 Baud or higher rate modem.
- the modem is also connected to the telephone line and provides an interface between the microprocessor and other elements of the computer network in which the microprocessor is used.
- a principal object of the invention is to provide a user-friendly telephone-computer suitable for accessing a bank computer system operating various bank software programs, involving individual checking accounts and the like, and additionally providing a user- riendly method of accessing other service computers, such as those which provide airline reservation functions, stock table look-up functions, electronic bulletin board services, and a vast panoply of other such services, and which can also operate as a conventional telephone.
- service computers such as those which provide airline reservation functions, stock table look-up functions, electronic bulletin board services, and a vast panoply of other such services, and which can also operate as a conventional telephone.
- the present telephone-computer accesses a network host as described in copending application Serial No. 08/084,319, filed June 30, 1993, which is a continuation of Serial No. 433,825, filed November 9, 1989 (now abandoned), and which is incorporated herein by reference.
- each user is provided with the telephone-computer 2 in accordance with the present invention, including the display 4 and limited format keypad 3, or an equivalent terminal with a keyboard, which communicates via conventional telephone lines indicated generally at 78, with a network host computer 68.
- the network host computer includes a session controller 66, which may comprise hardware and software and which includes various functional elements 64, 72, 74, and 76, as described more fully below.
- One essential function of the network host computer 68 is to provide a series of application program "pages" which are downloaded to the home telephone-computer 2 and which provide it with sufficient information that it can supply the user with sufficient "prompts” to elicit from the user whatever information - user codes, desired transactions, and the like - is required to access one of a plurality of service computers 80a-d to which the network host computer 68 is connected, also by conventional telephone lines.
- the telephone-computer 2 will send a message to the network host computer 68. This will in turn consult its internal memory to locate the application program required to access the service computer 80a of bank A and will download this to the home telephone-computer 2.
- the home telephone- computer will in turn operate using this program and will ask the user various questions required to prompt the user to input the information needed to access his account at the bank -- for example, his account number, his secret access code, the type of transaction desired, the amount of deposit, withdrawal, or transfer required, and so on.
- This information is then transferred from the home telephone-computer 2 to the network host computer 68 in a message having a first protocol.
- the network host computer transforms this information into whatever second protocol is conventionally required to communicate with the service computer 80a, for example, in the precise manner according to which automatic teller machines communicate with it.
- the network host computer will transform the answers into a somewhat different protocol required to access the service computer 80b of Bank B.
- a somewhat different sequence of prompts would be provided by the home telephone- computer 2, operating using an appropriate different "page" of application program software downloaded by the network host computer 68; a similarly different communication sequence would occur between the network host computer 68 and the airline reservation host computer 80d.
- the communication sequence and in particular the detailed format of the messages back and forth between the telephone-computer 2 and the network host 68 are described in detail below.
- Network host 68 Communication between the network host 68 and the various service computers 80a-d takes place according to various second protocols defined by the proprietors of the services supported by the service computers; implementation of these communications follows the techniques now in use with such preexisting service computers and is considered to be well within the skill of the art.
- the session controller 6 provided according to the present invention serves as a link between the telephone- computer 2 and a plurality of informational and financial service computer systems 80a-d.
- an important function of the network host 6 and of the telephone-computer 2 and the HAL software which it runs is to cooperatively transform the highly simplified, "user-friendly" request/response sequence seen and responded to by the user into the relatively complex communication sequence normally used to access the service computers 80a-d, and, vice versa, to modify the specialized display sequence typically presented by the service computers 80a-d into an easily understood presentation.
- these menu choices are varied in accordance with the service selected by the user. That is, the user-friendly interface, comprising a "tree" of new menus displayed sequentially and in response to each input provided by the user, until all information required to access the service has been specified, thus varies with the service. Provision of application programs page by page in response to the specification of a service according to the invention permits this flexibility, as it would be impractical to store all possible application programs in the telephone-computer.
- the session controller 66 functionally comprises a terminal interface controller (TIC) 64, a terminal protocol interface (TPI) 76, a session manager (SM) 72, and a common integrator (CI) 74.
- the TIC 74 monitors the message flow between the home telephone-computer 2 and the TPI 76 and controls timers to cause timeouts when message traffic ceases.
- the TPI 76 communicates with the home telephone-computer 2 and translates the protocol used by the home telephone-computer when first establishing a connection with the host network computer 8. Additionally, the TPI 76 generates random encryption key numbers when requested by the home telephone- computer 2. These encryption key numbers are used by the terminal program to transmit confidential information.
- the TPI 76 also handles application page downloading requests.
- the SM 72 maintains the essential data needed for each communication session by storing information relating to the user of the telephone-computer 2 and the service computer system 80a-d which the user is accessing. All transactions performed between the home telephone-computer 2 and the session controller 66 during a particular session occur within the context of the specific consumer and the service selected, e.g., his bank or other financial institution. For example, after the consumer has been successfully established as a valid and authorized user, all message traffic to the particular telephone-computer is thereafter considered related only to that consumer. This context determination, based on the consumer identification information, then allows the network host computer 68 to access the correct service computer 80a-d for such items as account balances, and so on.
- the SM 72 stores the contextual information required to validate the transaction and inserts it in messages passed to the CI 74 when necessary.
- the SM 72 also serves as the interface between the TPI 76 and the CI 74, which in turn serves as the communication link between the other elements of the session controller 66 and the service computer systems 80a-d.
- the user accesses one particular service computer 80a-d by selecting the corresponding option, i.e. the desired service, from a menu displaying the possible choices on the LCD of his home telephone-computer.
- Communication between the home telephone-computer 2, the session controller 66 and the selected service computer 80a-d is then begun with a session establishment and protocol selection phase.
- the home telephone-computer 2 connects to the network host computer 68 through a standard telephone line 78.
- the home telephone- computer 2 sends a series of signals by which the session controller 66 sets such parameters as the communication baud rate. For example, after the network host computer 68 sets the communication baud rate, it responds with a terminal type inquiry.
- the home telephone-computer 2 interprets this signal as a request to identify the type of terminal in use and responds with an ASCII code identifying the type of home terminal being used, i.e. a telephone-computer 2 in accordance with the present invention or a PC terminal.
- the network host 68 provides the important function of allowing the home telephone-computer 2 to mimic a conventional PC terminal running essentially conventional communication software. Therefore, the service computer 80a-d receives communication in precisely the same "service computer communication protocol" which it conventionally receives. Accordingly, the service computers need not be modified in any way for communication according to the invention, which is essential to achieving the objects thereof. As indicated, such conventional microcomputer systems may be also interfaced to the service computers 80a-d by way of the network host 68 according to the invention. In such case, the network host 68 will again respond to a request for access to a service computer 80a-d by downloading one or more "pages" of application software, user prompts, etc., allowing the conventional microcomputer to conveniently access the service computer 80a-d.
- a "link level” protocol is employed between the home computer and the session controller.
- the link level protocol all communications between the home telephone-computer 2 (or a conventional microcomputer, if used) and the network host computer 68 are formatted into information packets called messages.
- Figure 17 shows the basic format of the message 130. This message format is used for the majority of the messages sent between the network host and telephone-computer 2 or computer. Other related formats are used in special cases discussed below.
- Each message 130 begins with a one-byte start of text (STX) delimiter 132 which consists of the fixed ASCII code "2".
- STX start of text
- the next field of the message, the message text field 134 can contain up to 256 bytes of transaction information. It is within this message text field 134 that the actual transaction information is transferred.
- the message text field 134 can also contain information concerning the status of the message.
- SOH delimiter 136 Following the message text field 134 is a one-byte start of header (SOH) delimiter 136 which has a fixed ASCII value of "l". This SOH delimiter 136 signifies the end of the message text field 134 and the start of the Sliding Window Protocol Header 138.
- the Sliding Window Protocol Header 138 is provided according to an important aspect of the present invention, and contains control and error management information.
- This header 138 comprises a sequence number field 140, an acknowledge number field 142, a status field 144, and a checksum field 146, totalling six bytes in length.
- the sequence number field 140 is important to the error detection and control system employed according to the invention.
- This field contains a sequence number assigned by the transmitting device (i.e. either the home telephone- computer 2 or the network host) to each message sent. More specifically, the sequence number field 140 contains a one- byte ASCII encoded number from 0 to 9 specifying the order of the message 130 in a series of transmitted messages. The sequence numbers are assigned independently to the messages sent in both directions.
- Each successive message 130 is assigned a reference number one greater than that of the preceding message 130.
- the sequence numbers are applied in a cyclical fashion. That is, when sequence number 9 has been assigned to a message, the next message is assigned sequence number 0. This process is referred to as the "sliding window protocol" used for error detection and correction according to the invention.
- the receiving device stores the sequence number of the message most recently received. When a new message is received, the receiving device determines if the content of the sequence number field 140 is one greater than the sequence number of the preceding message received. If not, an error has been detected, and the receiving device directs the transmitting device to resend the preceding message. Additional security is provided by use of the checksum field 146, which contains a byte count for the entire message, which is written to the message by the network computer. This checksum value is compared with the byte count as determined by the receiving telephone-computer. If the checksum value is correct and the sequence number is in the proper order, the message is considered to have been received in good condition.
- the acknowledgement number field 142 of each message contains the sequence number of the last message received in good condition.
- the transmitting device stores the messages in a buffer for possible retransmission. If the transmitting device has stored one or more messages with higher sequence numbers than the last received acknowledgement number, those messages with a greater sequence number are retransmitted. Correspondingly, when an acknowledgement number is received, all stored messages having sequence numbers less than or equal to the last received acknowledgement number are discarded.
- This sequencing and acknowledgment method allows for the continuous flow of information without the delay associated with acknowledging each message before transmitting the next, and limits the amount of data which must be stored to implement this error correction arrangement.
- sliding window protocols of this general type, including use of sequence numbers and acknowledgement of messages, are generally known to the art. See generally, Tanenbaum, Computer Networks (Prentice Hall, 1981), esp. ⁇ 4.2 "Sliding window Protocols", pp. 148-164.
- the transmitting device ceases message transmissions and sends an immediate acknowledgement request in a null message, that is, a message which contains no information in its message text field, but which has a sequence number equal to that of the preceding message.
- the receiving device recognizes a null message by its repetition of the preceding sequence number. A null message is thus used to convey control information such as an immediate acknowledgement request.
- the status field 144 is a one byte (eight bit) field which informs the receiving device of the status of the message and provides a medium for various control requests.
- Figure 3 details the bits of the status field 144.
- Bits 7 and 5 are always set to zero and one, respectively, so that the value of the complete status byte 144 is in the range of 32 to 127.
- the value of the status field can be represented by the ASCII codes for print characters, which is convenient for diagnostic purposes.
- Bit 6 indicates the transmission channel over which the message is travelling. A value of 0 in bit 6 represents a foreground, or high priority, transmission channel, and a value of l in bit 6 indicates use of a background, or low priority, transmission channel.
- Bit 4 is used to inform the receiving computer whether the response is contained in more than one message and whether there is at least one more message to come which is related to the response contained in the present message.
- a value of 0 in bit 4 indicates that the present message is the last or only segment in a response while a value of l in bit 4 informs the receiving computer that the present message is the first or an intermediate segment of a multi-segment response.
- Bit 3 distinguishes normal session messages from connect messages used when communications are first established between the home computer and the network computer.
- a bit 3 value of 0 represents a normal data message, while a bit 3 value of l signifies a connect request or response.
- bit 2 indicates whether a message is a normal session message or a disconnect request, in which 0 indicates a normal session message and l requests a disconnect.
- Bit l is set to a value of 1 to request retransmission of all unacknowledged messages, i.e., messages with a higher reference number than the acknowledgement number of the message containing the retransmission request.
- a 0 value in bit l indicates a normal message.
- Bit 0 is set to a value of 1 to request acknowledgement from the receiving computer. This signal would be sent, for example, in the situation explained above, in which the sending computer has used all of the reference numbers and requires an acknowledgement before sending any more messages.
- a 0 value in bit 0 indicates a normal message.
- the checksum field 146 as indicated above contains a bit count or similar value calculated by the sending device; the same calculation is performed by the receiving device and compared to the stored value to confirm that the message has been correctly received.
- the message 130 concludes with a carriage return (CR) 148.
- the device 130 when one of the devices involved in a communication session sends a message 130 containing either an acknowledgement request, an acknowledgement response, a retransmit request, a connect request or a disconnect request, there may be no transaction data to be transmitted in the message text field.
- this information is sent through a null message, including a repeated reference number as above.
- This informs the receiving computer that any transaction data that may be contained in the text field is to be ignored and that the header information only is to be read.
- a null message for the above mentioned requests and responses.
- a normal message may be used which sends the request or response information, while transaction information is sent in the text field.
- Null messages are sent when a normal message is not available and an aclcnowledgement has been requested, or when the maximum number of messages is outstanding, and no more normal messages may be sent.
- the home telephone-computer sends a connect request message, shown in Figure 19.
- the session controller returns a connect response, shown in Figure 20, the session is established and all subsequent communications proceed using the message format discussed above.
- a series of messages (shown in Figs. 23 and 24) are exchanged to determine if the application pages resident in the home telephone-computer are current versions. Where necessary, outdated application pages in the home telephone-computer are replaced by current versions which are downloaded to the home telephone-computer, page by page, as need be, using the predefined message format. Updates are made only with respect to the application page(s) specific to the service of current interest to the user. This reduces the delay experienced by the user, while eliminating any requirement that all users have the same version of each application page.
- the terminal program interface (TPI) 16 instructs the telephone- computer computer via a downloaded page to send a request for an encryption key.
- the TPI returns a randomly generated key.
- the telephone-computer 2 uses this to encrypt the consumer's personal identification code (PIC) , that is, a code indicating his right to access the secure database.
- PIC personal identification code
- the encrypted PIC is then transmitted to the network host 68 in a user verification message.
- any other secure information may be encrypted at any time during a session if the terminal program includes instructions for sending additional encryption messages. Each time a key is requested, a new encryption key is generated.
- the consumer may perform various transactions with the informational and financial service computer systems. Such transactions can take a variety of forms, as will be understood by those of skill in the art.
- the consumer can effect transactions with service providers. Operations then proceed in a simple and straightforward manner.
- the consumer is prompted by software downloaded to the home telephone-computer as need be to provide any additional input required, and the appropriate message is sent by the home telephone-computer to the service computer which actively accesses the database bank records, etc., involved.
- the home telephone-computer 2 provides a user-friendly interface, and the network host computer 68 translates the user's responses to prompts, sent by the telephone-computer 2 to the host in a first format, into the format conventionally employed to access the particular service computer 80a-d providing the service desired.
- the prompts be sufficiently definite that the user can input all required instructions using only the 12 keys of a telephone keypad responsive to prompts which are updated in response to the sequence of prior responses. This greatly simplifies use of the system, and contributes substantially to the user friendliness which is a goal of the invention.
- the home telephone-computer 2 sends a connect request message shown in Figure 19.
- the connect request message contains no information in the message text field, but the connect bit, bit 3 of the status field 144 of the sliding window protocol header (see Figure 18), is set to 1.
- the sequence and acknowledgment fields 140 and 142 are shown in Figure 19 is set to zero, but the sequence number may begin as a number from 0 to 9.
- the network host computer 68 When the network host computer 68 receives the connect request message of Figure 19 from the home telephone-computer 2, it sends a connect message response shown in Figure 20. As with the connect request message, the connect bit in the status field 144 is set to l. Although the sequence and acknowledgement fields 140 and 142 are again shown here as "0", the network computer echoes back, in the acknowledgment field 142 of the connect response message, the sequence number sent by the home telephone-computer in the connect request message. As noted, the network terminal 68 may start the sequence with any number from 0 to 9. In its next message, the home telephone-computer 2 will similarly include an acknowledgement number equal to the sequence number of the connect response message. The other fields of the connect and connect response messages are as described above.
- the message text field 134 includes at least four sub-fialds when used for sending transaction message text.
- the first field of the message text field 134 is a transaction type code 162, which is normally numeric. This is followed by one or more groups of three fields. Each group of three fields includes an element identification field 164, an element length field 168 and the actual element data field 160.
- the service computer 80a-d selected requires a user identification number, and a request to this effect has been sent to the home telephone-computer 2 by the network host computer 8, the home telephone-computer generates a message including a code in the element ID field 164 indicating that the subsequent element data field 160 includes the user identification number.
- the element length field 168 then simply includes the actual length in bits of the data element 160. Additional data, such as the user account number, can be included in the same message; again, the account number would be located in an element data field 160, and would be preceded by an element ID indicating that the subsequent data field includes the account number, and an element length field 168.
- This method of communicating data elements by providing them in groups of three fields, specifying the element identification and the element length, is important to the efficient realization of the communications scheme according to the invention.
- Figure 22 shows the format of a page downloaded message.
- This format is used for downloading pages of HAL software from a network host computer 68 to the individual telephone- computers 2. For example, suppose the home telephone-computer 2 is used to initiate a communication session in response to a user's pressing a key identifying the initial request for access to a service computer 80a-d. The initial request for access to a service will be interpreted by the network host 68 to specify the HAL application page to be used to access the service computer. If necessary, the network host will download the latest version of that page using the downloading message text format shown in Figure 22. This text is stored in the message text frame 134 of the overall message shown in Figure 17.
- the downloading message text format commences with a transaction type code field 80 in which is provided an alphabetic transaction code indicating, for example, that the subsequent data is a page of a HAL application program. This is followed by a page number field 84 which includes the page number of the following page of software, or other identification data needed. Finally, the actual application software page needed by the home telephone-computer is provided in a page data field 86.
- the following description of Figures 23 and 24 provides a more detailed view of the way in which the home telephone- computer and network host determine that an update of a particular software page or pages is necessary. As noted, to ensure that the home telephone-computer does not utilize outdated application pages, each session begins with a page update exchange.
- These are exemplary of transaction text messages, and will provide to those of skill in the art sufficient information to implement the other communications necessary to effect the functions of the invention. Other necessary messages generally follow the same format; their detailed functions and implementation are considered to be within the skill of the art.
- the home telephone-computer sends an update reference number (URN) request message following the receipt of the connect response message.
- URN request message is a normal message containing the URN coded request in the message text field.
- the URN request begins with a transaction code 162, shown here as VER.
- the data field 134 in this request message comprises the page numbers 168 of the application pages stored in the home telephone-computer 2 at the beginning of the present session.
- the URN messages also specifies in a field 170 marked P/H which type of home telephone-computer is being used. This information is important in determining the priority used in sending update information.
- the final data field 176 includes the terminal ID (ADID) .
- the network computer responds to the URN request message of Figure 23 with a URN response message shown in Figure 24.
- the transaction code 162 (VER) is repeated. This repetition of transaction codes is used in all transaction messages in order for the, receiving device to determine the request message to which a given response applies.
- the next data field 170 in the URN response is the URN for the current application page stored in the network computer.
- the final data field is a 2 digit status code 174 which informs the host terminal whether page updating is necessary.
- the network host computer 68 accumulates the list of pages that have new versions from a cross reference file, employing the home terminal URN and the network terminal URN.
- An immediate send flag is provided which is set to "l" for pages related to particularly significant functions such as log-on or the main menu displayed to the user. These pages are downloaded prior to sending the URN response message, that is, immediately upon establishment of the session. If any, of the pages have an Immediate Send flag set to "1", they are put at the top of the download file. The pages with the flag set to "0" are put in a zero length transactional file.
- the use of the network host 68 to update the software comprised by the home telephone-computer page by page also has great significance, in that in this way the home telephone- computer can be provided with many additional capabilities, while remaining a relatively inexpensive and compact unit and retaining the "user-friendly" appearance which is highly desirable. Furthermore, this capability allows access to further services to be provided in the future without requiring any physical modification of the telephone-computer.
- the "sliding window” error detection and correction scheme is also highly useful in realizing the objects of the invention.
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Abstract
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US08/213,791 US5572572A (en) | 1988-05-05 | 1994-03-16 | Computer and telephone apparatus with user friendly interface and enhanced integrity features |
US213791 | 1994-03-16 | ||
PCT/US1995/003424 WO1995025396A2 (fr) | 1994-03-16 | 1995-03-16 | Appareil informatique et telephonique a interface conviviale et a caracteristiques d'integrite ameliorees |
Publications (2)
Publication Number | Publication Date |
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EP0750817A1 true EP0750817A1 (fr) | 1997-01-02 |
EP0750817A4 EP0750817A4 (fr) | 1997-03-26 |
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Application Number | Title | Priority Date | Filing Date |
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EP95914109A Withdrawn EP0750817A4 (fr) | 1994-03-16 | 1995-03-16 | Appareil informatique et telephonique a interface conviviale et a caracteristiques d'integrite ameliorees |
Country Status (7)
Country | Link |
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US (1) | US5572572A (fr) |
EP (1) | EP0750817A4 (fr) |
KR (1) | KR970701964A (fr) |
CN (1) | CN1146262A (fr) |
AU (1) | AU2123495A (fr) |
CA (1) | CA2185662A1 (fr) |
WO (1) | WO1995025396A2 (fr) |
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-
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- 1995-03-16 CA CA002185662A patent/CA2185662A1/fr not_active Abandoned
- 1995-03-16 KR KR1019960705182A patent/KR970701964A/ko not_active Application Discontinuation
- 1995-03-16 EP EP95914109A patent/EP0750817A4/fr not_active Withdrawn
- 1995-03-16 CN CN95192638A patent/CN1146262A/zh active Pending
- 1995-03-16 AU AU21234/95A patent/AU2123495A/en not_active Abandoned
- 1995-03-16 WO PCT/US1995/003424 patent/WO1995025396A2/fr not_active Application Discontinuation
Non-Patent Citations (2)
Title |
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No further relevant documents disclosed * |
See also references of WO9525396A2 * |
Also Published As
Publication number | Publication date |
---|---|
CA2185662A1 (fr) | 1995-09-21 |
AU2123495A (en) | 1995-10-03 |
US5572572A (en) | 1996-11-05 |
EP0750817A4 (fr) | 1997-03-26 |
CN1146262A (zh) | 1997-03-26 |
KR970701964A (ko) | 1997-04-12 |
WO1995025396A2 (fr) | 1995-09-21 |
WO1995025396A3 (fr) | 1996-02-29 |
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